describe Large bird feeder: 21 x 13 x 10 cm / 11.8 x 5 x 4 inches (L x W x H) Transparent design: The transparent sticker is convenient for observing bird nesting indoors without disturbing the birds. The transparent sticker has a protective film, tear it off. Please remove the protective film when using. Perfect for home windows. Attracts a variety of bird habitats. While relaxing in your favorite chair and working at your desk, bird watching is easy and fun in the comfort of your home, and children and pets love watching birds just inches from your face. Easy installation: 2 powerful suction cups can firmly fix the birdhouse on the glass, quick and easy installation, no tools required. Make sure your nest is securely attached to windows, even in extreme weather conditions. It can be attached to any window (no screens). If you're worried about the lack of suction from the suction cups, there's also a strap on the top of the birdhouse, so you can hang it from a sturdy tree branch and